官方答案:class Solution { public int peakIndexInMountainArray(int[] A) { int lo = 0, hi = A.length - 1; while (lo < hi) { int mi = lo + (hi - lo) / 2; if (A[mi] < A[mi + 1]) lo = mi + 1; else hi = mi; } return lo; } } Time Complexity: O(logN) Space...
https://github.com/grandyang/leetcode/issues/852 类似题目: Find Peak Element 参考资料: https://leetcode.com/problems/peak-index-in-a-mountain-array/ https://leetcode.com/problems/peak-index-in-a-mountain-array/discuss/139848/C%2B%2BJavaPython-Better-than-Binary-Search LeetCode All in One ...
A[i]为数组A的最大值,然后返回其在A中的索引即可 代码实现 class Solution: def peakIndexInMountainArray(self, A): """ :type A: List[int] :rtype: int """ return A.index(max(A)) 1. 2. 3. 4. 5. 6. 7.
解法: classSolution{public:intpeakIndexInMountainArray(vector<int>& A){intsz = A.size();for(inti =1; i < sz; i++){if(A[i] < A[i-1]){returni-1; } }return-1; } };
LeetCode题解之Peak Index in a MountainArray 1 题目描述 2、问题分析 直接从后向前遍历,找到 A[i] > A[i-1] 即可。 3.代码 1intpeakIndexInMountainArray(vector<int>&A) {2inti = A.size() -1;3while( i >0){4if( A[i] > A[i-1]){5returni;6}7i--;8}9}...
[LeetCode] 852. Peak Index in a Mountain Array Easy Let's call an arrayAamountainif the following properties hold: A.length >= 3 There exists some0 < i < A.length - 1such thatA[0] < A[1] < ... A[i-1] < A[i] > A[i+1] > ... > A[A.length - 1]...
leetcode.852.PeakIndexinaMountainArray links: https://leetcode.com/problems/peak-index-in-a-mountain-array/ 我的思路,直接遍历查找,找到第一个变小的数的位置,之前的那个位置就目的index 1 2 3 4 5 6 7 8 9 10 11 12 classSolution(object):...
LeetCode 852 Peak Index in a Mountain Array 解题报告 题目要求 Let's call an arrayAa mountain if the following properties hold: A.length >= 3 There exists some0 < i < A.length - 1such thatA[0] < A[1] < ... A[i-1] < A[i] > A[i+1] > ... > A[A.length - 1]...
class Solution{ public: int peakIndexInMountainArray(vector<int>& a){ int max_elem = *max_element(a.begin(), a.end()); int pos; for(pos = 0; pos < a.size(); ++pos){ if(a[pos] == max_elem) break; } return pos; } };...
LeetCode 852. Peak Index in a Mountain Array 原题链接在这里:https://leetcode.com/problems/peak-index-in-a-mountain-array/ 题目: Let's call an arrayAamountainif the following properties hold: A.length >= 3 There exists some0 < i < A.length - 1such thatA[0] < A[1] < ... A...